function sender(&$dispatcher)
{
$this->_dispatcher =& $dispatcher;
}
function foo()
{
$this->_dispatcher->post($this, 'onFoo', 'Some Info...');
}
}
/**
* example observer
*/
function receiver1(&$notification)
{
echo "receiver 1 received notification<br />\n";
// the notification will be cancelled and no other observers
// will be notified
$notification->cancelNotification();
}
/**
* example observer
*/
function receiver2(&$notification)
{
echo "receiver 2 received notification<br />\n";
}
$dispatcher =& Event_Dispatcher::getInstance();
$sender = new sender($dispatcher);
$dispatcher->addObserver('receiver1', 'onFoo');
$dispatcher->addObserver('receiver2', 'onFoo');
$sender->foo();
echo "receiver 2 received notification<br />\n";
}
/**
* example observer
*/
function receiver3(&$notification)
{
echo "receiver 3 received notification<br />\n";
}
// get the different dispatchers
$dispatcher1 =& Event_Dispatcher::getInstance();
$dispatcher2 =& Event_Dispatcher::getInstance('child');
$dispatcher3 =& Event_Dispatcher::getInstance('grandchild');
// create senders in two different levels
$sender1 = new sender($dispatcher1);
$sender2 = new sender($dispatcher2);
// build three levels
$dispatcher1->addNestedDispatcher($dispatcher2);
$dispatcher2->addNestedDispatcher($dispatcher3);
// add observers in level one and two
$dispatcher1->addObserver('receiver1', 'onFoo');
$dispatcher2->addObserver('receiver2', 'onFoo');
// this will bubble up from 1 to 3
echo 'sender1->foo()<br />';
$sender1->foo();
// this will not bubble up
echo '<br />';
echo 'sender1->foo(), but disable bubbling<br />';
$sender1->foo(false);
// this will bubble up from 2 to 3
echo '<br />';
